hi all,
i have two problems :
1. i configured ip on a win XP m/c that had two LAN cards , one for internal LAN and another for external.the problem is that when i ping the system with its hostname or local host ip "127.0.0.1" it pings but when i ping using either of the ips i configured on cards it gives "ttl expired in transit".also after configuring the ips the m/c sometimes asks for restart sometimes not.what is the reason?is it any virus?Also could u please tell me what is the difference between the two icmp errors "request timedout" and "ttl expired in transit".
2. i connected cisco 1721 router with consol port.when i tried to access using hyperterminal it gives a blank cursor not the "router>" prompt which it should.what may be the problem?
thankns for help...

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Problem is caused simply by fact that your two network cards are not physically linked, other than through internals. If you try to ping one of these IP's, message is being sent via the other interface, and has no way of arriving at the destination. Difference in messages will be caused by whether the interface used recognises the other address as internal, or external to the machine, if internal message will simply echo back and forth between 127.0.0.1, and Interface IP until ttl(time to live) expires, if external it will simply transmit and wait out timeout. May be worth checking routing table on machine, you may be able to manually change behavior by adjusting this, (making sure that routing for each IP address is through itself)

Also Hyperterminal is not the best choice since you can't send BREAK signals, which is necessary if you need to drop into the ROM moniotor to do things like password resets, etc. I use the free program TeraTerm from http://www.ayera.com/teraterm/ as my terminal program.

ttl expired in transit means that Time To Live The packets are probably falling into a bit bucket. The data is not reaching its destination to give you a reply back. The ususal ttl is usually in the milliseconds (ms). You also need to look at the sent, received and lossed packets this will give you an idear of the % of loss that you are having. On the desktop if you can get to the web go to www.ipchicken.com and see what ip address you are getting. Hope this helps.

Actually HyperTerm will allow you to send a break sequence, there was an issue with the version that shipped with NT, but if you go to Hilgraeves website you can download an newer version that will work.
Any version since NT - Win2k and XP - hyperterminal does send break sequences.
Also if you do connect to the router at 9600 and the characters are funny, then you need to check different speeds, typically 115200 or 33600 will be the ones that come up. The 1721 has a maximum baud rate of 115200, this is handy when doing an xmodem from rommon.
Cheers,
CatMan - ex-CiscoTAC

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